1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portlet;
24  
25  import java.io.IOException;
26  
27  import java.util.Collections;
28  import java.util.List;
29  
30  import javax.portlet.ActionRequest;
31  import javax.portlet.ActionResponse;
32  import javax.portlet.EventPortlet;
33  import javax.portlet.EventRequest;
34  import javax.portlet.EventResponse;
35  import javax.portlet.Portlet;
36  import javax.portlet.PortletException;
37  import javax.portlet.RenderRequest;
38  import javax.portlet.RenderResponse;
39  import javax.portlet.ResourceRequest;
40  import javax.portlet.ResourceResponse;
41  import javax.portlet.ResourceServingPortlet;
42  import javax.portlet.filter.ActionFilter;
43  import javax.portlet.filter.EventFilter;
44  import javax.portlet.filter.FilterChain;
45  import javax.portlet.filter.PortletFilter;
46  import javax.portlet.filter.RenderFilter;
47  import javax.portlet.filter.ResourceFilter;
48  
49  /**
50   * <a href="FilterChainImpl.java.html"><b><i>View Source</i></b></a>
51   *
52   * @author Brian Wing Shun Chan
53   */
54  public class FilterChainImpl implements FilterChain {
55  
56      public FilterChainImpl(
57          Portlet portlet, List<? extends PortletFilter> portletFilters) {
58  
59          _portlet = portlet;
60  
61          if (portletFilters != null) {
62              _portletFilters = portletFilters;
63          }
64          else {
65              _portletFilters = Collections.EMPTY_LIST;
66          }
67      }
68  
69      public void doFilter(
70              ActionRequest actionRequest, ActionResponse actionResponse)
71          throws IOException, PortletException {
72  
73          if (_portletFilters.size() > _pos) {
74              ActionFilter portletFilter = (ActionFilter)_portletFilters.get(
75                  _pos++);
76  
77              portletFilter.doFilter(actionRequest, actionResponse, this);
78          }
79          else {
80              _portlet.processAction(actionRequest, actionResponse);
81          }
82      }
83  
84      public void doFilter(EventRequest eventRequest, EventResponse eventResponse)
85          throws IOException, PortletException {
86  
87          if (_portletFilters.size() > _pos) {
88              EventFilter portletFilter = (EventFilter)_portletFilters.get(
89                  _pos++);
90  
91              portletFilter.doFilter(eventRequest, eventResponse, this);
92          }
93          else {
94              EventPortlet eventPortlet = (EventPortlet)_portlet;
95  
96              eventPortlet.processEvent(eventRequest, eventResponse);
97          }
98      }
99  
100     public void doFilter(
101             RenderRequest renderRequest, RenderResponse renderResponse)
102         throws IOException, PortletException {
103 
104         if (_portletFilters.size() > _pos) {
105             RenderFilter portletFilter = (RenderFilter)_portletFilters.get(
106                 _pos++);
107 
108             portletFilter.doFilter(renderRequest, renderResponse, this);
109         }
110         else {
111             _portlet.render(renderRequest, renderResponse);
112         }
113     }
114 
115     public void doFilter(
116             ResourceRequest resourceRequest, ResourceResponse resourceResponse)
117         throws IOException, PortletException {
118 
119         if (_portletFilters.size() > _pos) {
120             ResourceFilter portletFilter = (ResourceFilter)_portletFilters.get(
121                 _pos++);
122 
123             portletFilter.doFilter(resourceRequest, resourceResponse, this);
124         }
125         else {
126             ResourceServingPortlet resourceServingPortlet =
127                 (ResourceServingPortlet)_portlet;
128 
129             resourceServingPortlet.serveResource(
130                 resourceRequest, resourceResponse);
131         }
132     }
133 
134     private Portlet _portlet;
135     private List<? extends PortletFilter> _portletFilters;
136     private int _pos;
137 
138 }